Indoor air quality testing in commercial and industrial environments is crucial to the safety, comfort and long-term health of people. Make safety your top priority with handheld combustible gas detector devices designed to accurately and instantaneously check for gas leaks. To check for specific gases, such as dangerous levels of carbon monoxide or carbon dioxide, choose from a selection of gas analyzer units loaded with practical features. If you are checking an indoor space for specific pollutants such as mold, dust mites or other allergens, select an air quality testing and screening kit that is easy and convenient to use. Grainger has all the indoor air quality test instruments to ensure a safe and healthy environment for everyone.